<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        html,
        body {
            height: 100%;
        }

        body {
            background: black;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .ul {
            position: relative;
            width: 100px;
            height: 50px;
            padding: 10px;
            list-style: none;
            overflow: hidden;
        }
        .harmony {
            position: absolute;
            top: 20px;
            left: 10px;
            width: 70px;
            height: 70px;
            border: 15px solid white;
            border-radius: 50%;
            transform: translateY(0);
            animation: move1 2.4s ;
        }
        /* 展示下半圆 */
        ul:last-of-type .harmony {
            top: -50px;
            transform: translateY(0);
            animation: move2 2.4s ;
        }
        @keyframes move1 {
            0% {
                transform: translateY(50%);
            }
            50% {
                transform: translateY(0);
            }
        }
        @keyframes move2 {
            0% {
                transform: translateY(-50%);
                filter: blur(5px);
            }
            50% {
                transform: translateY(0);
                filter: blur(2px);
            }
            100% {
                transform: translateY(0);
                filter: blur(0);
            
            }
        }
    </style>
</head>

<body>
    <div class="container">
        <ul class="ul">
            <li class="harmony"></li>
        </ul>
        <ul class="ul">
            <li class="harmony"></li>
        </ul>
    </div>
</body>

</html>